Elastic Block Store (EBS) is the service that provides storage infrastructure for EC2. We can choose many different storage types depending on the usage purpose. Managing the types of storage that can be used is also very important in cost management. In this step we will create an IAM policy that does not allow the use of the Provisioned IOPS (io1) volume type. Provisioned IOPS (io1) is a volume type that provides high performance and is only intended for critical applications.